What does bad gasoline smell like?

Bad gasoline typically has a strong, unpleasant odor that can be described as sour or off-putting, often with a hint of a chemical or rotten smell. This can indicate contamination or the presence of additives that have degraded over time. Fresh gasoline has a sharp, pungent aroma, while bad gasoline may have a more muted or rancid scent. If gasoline smells unusual or significantly different from its normal scent, it may be wise to avoid using it.